Jonathan Gonzalia defeated Diego Hartfield 6-3 6-2 in the Argentina F14 round of 16 on clay. The upset overturned the form book — Diego Hartfield came in leading the head-to-head 1–0, but Jonathan Gonzalia had been the form player, winning 5 of their last 7 on clay. Jonathan Gonzalia claimed a first win over Diego Hartfield in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2005-05-09 | Argentina F5 | QF | clay | Diego Hartfield | 6-1 6-3 |